Sega INITIAL "D" TYPE TWIN. - Manual (Page 80)

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 Primary side and Secondary side
The monitor's circuit which is divided into the Primary side
and Secondary side, is electrically isolated. Do not touch
the primary side, or do not touch both the primary side
and the secondary side simultaneously. Failing to observe
the instruction can cause electric shock and this is very
dangerous. When making monitor adjustments, use a non-
conductive driver and make adjustment without touching
any part other than the Adjustment V. R. and knob. Also,
be sure not to cause a short-circuit to the Primary side and
Secondary side. If short-circuited, it can cause electric
shock or malfunctioning, which is very dangerous.
 High-tension Voltage
Some of the parts inside monitor are subject to high-tension voltage in excess of 20,000 volts and
very dangerous. Therefore, do not touch the monitor interior. Should soldering & paper wastes,
etc. be mixed in the monitor interior, turn the power off so as not to cause malfunctioning or fire
hazard.
 Static Electricity
Touching the CRT surface sometimes causes you to slightly feel electricity. This is because the
CRT surfaces are subject to static and will not adversely affect the human body.
 Installation and removal
Ensure that the Magnetizer Coil, FBT (Fly-Back Transformer), Anode Lead and Focus Lead are
not positioned close to the sheet metal work's sharp edges, etc. and avoid damaging the insulated
portions so as not to cause electric shock and malfunctioning. (For the name of parts, refer to the
above Figures).
SECONDARY SIDE
(Chassis, CRT)
ANODE LEAD
Approx. 29 kV
MAIN BD
FBT Approx.
29 kV
ANODE CAP
FOCUS LEAD
(black)
Approx. 10 kV
SECONDARY SIDE
(Chassis, sheet metal work, CRT, etc.)
Disconnect or unplug
NECK PCB
Approx.
10 kV
REAR PART
PRIMARY SIDE
 Connecting the CRT and PCB
For combining the CRT and PCB, use the specified part No. to maintain the status of adjustments
made at the factory. The anode of the CRT itself will be accumulatively charged as time elapses,
generating high-tension voltage which is very dangerous. The monitor should be used with the
Chassis, CRT and PCB assembled. When repair, etc. is required at the time of malfunctioning, be
sure to send it in an "as is assembled" condition. If these are disassembled, what's charged to said
high tension voltage can be discharged, causing a very hazardous situation. Therefore, under no
circumstances should it be disassembled.
 When performing such work as installing and removing the monitor, inserting and disconnecting
the external connectors to and from monitor interior and the monitor, be sure to disconnect the
power connector (plug) before starting the work. Proceeding the work without following this
instruction can cause electric shock or malfunctioning.
 Using the monitor by converting it without obtaining a prior permission is not allowed. SEGA
shall not be liable for any malfunctioning and accident caused by said conversion.
15. MONITOR
Before handling the monitors, be sure to read the following explanations and comply with the
caution/warning instructions given below. Note that the caution/warning symbol marks and letters
are used in the instructions.
Indicates that handling the monitors by
disregarding this caution may cause a
potentially hazardous situation, which could
result in personal injury and or material
damage.
Indicates the instruction to disconnect a power
connector or to unplug.
Indicates that handling the monitors
erroneously by disregarding this warning
may cause a potentially hazardous situation,
which could result in death or serious injury.
Indicates that access to a specific part of the
equipment is forbidden.
PRIMARY
SIDE
DEMAGNETIZER
COIL
DEMAGNETIZER COIL
15-1 CAUTIONS AND WARNINGS CONCERNING THE SAFETY FOR HANDLING THE MONITORS
WARNING!
WARNING!
WARNING!
CAUTION!
CAUTION!